Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c1abb4d2e94064d…

MALICIOUS

PDF

45.6 KB Created: 2020-09-10 12:47:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b6c9bcd16c6852b6f35be911c2d7ee9 SHA-1: d7d69bd604669c10cf81967da11e796a0b7df4a3 SHA-256: 2c1abb4d2e94064d172d0e5f4cddf8cb4f43eb7dca3a050fd75a6bced1b7af2d
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, with one specifically pointing to a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this, and 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is https://ttraff.ru/wix?keyword=android+arraylist+add+string+array, which is likely used to redirect users to further malicious content or phishing pages.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/wix?keyword=android+arraylist+add+string+array
    • http://files.shelleypearsonwrites.com/uploads/1/3/0/7/130775786/kokizererurerom-wanemakedilex-nozorenon.pdf
    • http://pawuwez.cantonohiolandscaping.com/uploads/1/3/0/7/130776321/3998718.pdf
    • http://midedaros.smashstudiosfitness.com/uploads/1/3/0/7/130739678/8e8d768.pdf
    • http://defigumom.shadowwolf-studios.com/uploads/1/3/1/4/131437294/7319618.pdf
    • http://judod.thinktify.com/uploads/1/3/0/8/130874493/wosidotopi-wugezonibu.pdf
    • https://static.usrfiles.com/ugd/ea9bdf_23ecb2ba3d5c4680862e653473843d3d.pdf
    • https://static.usrfiles.com/ugd/de02f3_8a575714bd394a738b23033f0dd15257.pdf
    • https://static.usrfiles.com/ugd/221f3a_ead48925f56242bb8e9e6407dfac8c68.pdf
    • https://static.usrfiles.com/ugd/d1c05f_52044c3756e6431b8d3f1751b06138b8.pdf
    • https://static.usrfiles.com/ugd/800b88_3f57ccaa560e44849d1c5109040de6f6.pdf
    • https://static.usrfiles.com/ugd/724bd4_ef082de0679347dd8e15b0aed224be89.pdf
    • https://static.usrfiles.com/ugd/d1d005_e5ddb13a10eb45fda53cf841218c149d.pdf
    • https://cdn.shopify.com/s/files/1/0431/6522/1023/files/leibel_and_phillips_textbook_of_radiation_oncology.pdf
    • https://cdn.shopify.com/s/files/1/0435/6649/7960/files/43349765724.pdf
    • https://cdn.shopify.com/s/files/1/0435/8068/6495/files/84912659555.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006779.bin
eea882856f0cccf595aed6fe36193324ee4c34f84d60e53b065266af0f9b52b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6779 5084 bytes
font_01_sfnt_off000078dc.bin
8592f9c4287f5f78ab69cda50ba450c9f685dee3f09fc19623d4b758d0aa1d74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78DC 15332 bytes

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